Leaving his warm and loving mama behind, Melville the sea creature sets off for an adventure, and he knows just the kind of place he's looking for. Along the way, he gets lost (briefly), encounters sharks and other big sea creatures, and floats past a pirate ship. Melville checks out a few spots, but all fall short of his dream place...until, weary from his adventures, he finds his way back to his mama--a place that is "just right."